CN114768317B - Thickener - Google Patents

Abstract

The invention discloses a thickener, which comprises a support frame and a concentration tank fixedly connected on the support frame, wherein the concentration tank is connected with a discharging unit, the bottom in the concentration tank is provided with a concentration detection mechanism, the discharging unit comprises an underflow pump, the concentration tank is connected with a feed inlet of the underflow pump, the thickener also comprises a driving piece, the output end of the driving piece is provided with a speed regulation mechanism, the shaft of the underflow pump is connected with the output end of the speed regulation mechanism, and the speed regulation mechanism regulates and controls the rotating speed of the underflow pump based on the detection value of the concentration detection mechanism; according to the invention, the change of the slurry concentration at the bottom of the concentration tank can be detected in real time through the arrangement of the concentration detection mechanism, and the speed regulation mechanism can regulate the rotating speed of the underflow pump in real time according to the detection value of the concentration detection mechanism, so that the underflow pump accelerates or slows down the speed of pumping the slurry out of the concentration tank, the residence time of the slurry at the bottom of the concentration tank is controlled, and the slurry concentration is controlled.

Description

Thickener

Technical Field

The invention relates to the technical field of relative thickeners, in particular to a thickener.

Background

As is known, the main function of a thickener is to increase the pulp concentration to meet the technical requirements of pipeline transportation, and an underflow pump arranged at the bottom outside a concentration tank is to output pulp with qualified concentration and PH value. The thickener is suitable for dewatering concentrate and tailings in concentrating plants, is widely used for treating slime, waste water and waste residues in metallurgy, chemical industry, coal, nonmetal ore dressing, environmental protection and other departments, and has important significance for improving the backwater utilization rate and the underflow conveying concentration and protecting the environment.

If the publication number is CN105664544B, and the publication date is 2018, 12 years, 04 days, a thickener comprises a bin body, a rake frame and at least two feeding pipes, wherein the bin body comprises a cylindrical part and a conical part, the upper end of the conical part is connected with the lower end of the cylindrical part, the lower end of the conical part is provided with a sand discharge port, the inner cavity of the conical part is communicated with the inner cavity of the cylindrical part, the at least two feeding pipes convey materials into the bin body from the upper end of the cylindrical part, and the rake frame for stirring the materials is arranged in the conical part. According to the thickener provided by the embodiment of the invention, as the materials enter the cylindrical part from the at least two feeding pipes, the materials can be uniformly distributed in the bin body, the concentration effect is ensured, and meanwhile, as the materials are uniformly distributed in the bin body, the concentrated materials can be continuously and stably discharged from the sand discharge port, and the treatment effect of the bin body is improved to a certain extent.

The prior art has the disadvantages that because the underflow concentration of the concentration tank needs to be kept within the design range, theoretically, because the feeding speed and the discharging speed of the concentration tank are basically constant, and the capacity of the concentration tank is large, the underflow concentration of the concentration tank cannot be influenced by short-time feeding and discharging fluctuation, but in the prior art, because the rotating speed of the underflow pump is constant, the underflow concentration still can exceed the design range after long-time use or feeding and discharging fluctuation.

Disclosure of Invention

The invention aims to provide a thickener, which solves the technical problem of slurry concentration change in the related technology.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a thickener, includes support frame and the concentrated pond of rigid coupling on the support frame, concentrated pond is connected with the unit of unloading, the bottom is equipped with concentration detection mechanism in the concentrated pond, the unit of unloading includes the underflow pump, concentrated pond is connected with the feed inlet of underflow pump, still includes the driving piece, speed adjusting mechanism is installed to the driving piece output, the axle and the speed adjusting mechanism output of underflow pump are connected, speed adjusting mechanism regulates and control the rotational speed of underflow pump based on concentration detection mechanism's detection numerical value.

The speed regulating mechanism comprises a driving part connected with the output end of the driving part, a driven part connected with the shaft of the underflow pump, and a linkage part for transmitting kinetic energy of the driving part to the driven part, and the support frame is provided with a position regulating mechanism for controlling displacement of the linkage part.

The underflow pump is characterized in that a slurry suction groove is formed in the feed inlet of the underflow pump, when the underflow pump works, vacuum is generated in the slurry suction groove to generate suction to slurry in the concentration tank, an access hole is formed in the slurry suction groove, and the access hole is sealed by a transparent cover plate.

Foretell, the access hole department is equipped with the adaptation and inhales the pressure adaptation subassembly that thick liquid inslot pressure changed, the pressure adaptation subassembly includes the support, the connection that the support can be dismantled is connected with the access hole, set up on the support and inhale the adaptation groove of thick liquid groove intercommunication, the adaptation inslot slides and is equipped with the adaptation piece, be connected through the elastic component between support and the adaptation piece.

In the above, the surface of the adapting block close to the pulp suction groove is in a circular arc structure.

The joint of the pulp suction groove and the adaptive groove is provided with the elastic sheet, and the surface of the elastic sheet facing the pulp suction groove is of a circular arc structure when the elastic sheet is extruded by the adaptive block.

The concentrated slurry tank is characterized in that a rake frame is axially arranged on the concentrated tank, a material pushing plate is installed at the bottom end of the rake frame, the inner wall of the concentrated tank is in sliding contact with the material pushing plate, the bottom of the concentrated tank is connected with the slurry suction groove through a material conveying pipe fitting, a stirring component is arranged in the material conveying pipe fitting, and the stirring component is used for stirring slurry entering the material conveying pipe fitting based on the power of the material pushing plate.

The stirring assembly comprises a gear ring which is rotatably arranged on a material conveying pipe fitting, a stirring shaft is arranged inside the material conveying pipe fitting, a plurality of stirring sheet bodies are arranged on the stirring shaft side by side, an annular rack is arranged on the inner wall of the concentration tank in a circumferential sliding manner, the annular rack is pushed to move synchronously in the working stroke of the material pushing plate, a transmission shaft is arranged on the support frame in a rotating manner, the gear ring is meshed with one end of the transmission shaft through teeth, and the rack is meshed with the other end of the transmission shaft through teeth.

The stirring shaft is provided with a plurality of stirring sheets, one end of each stirring sheet is embedded on the stirring shaft, and the sheet surface of each stirring sheet is obliquely arranged with the axis of the stirring shaft.

In the above, all the dispersing blades are spirally arranged in the axial direction of the dispersing shaft.

The invention has the beneficial effects that: the concentration detection mechanism is arranged to detect the change of the slurry concentration at the bottom of the concentration tank in real time, and the speed regulation mechanism can regulate the rotating speed of the underflow pump in real time according to the detection value of the concentration detection mechanism, namely when the concentration of the underflow of the concentration tank is increased to exceed the design range, the speed regulation mechanism improves the operating speed of the underflow pump, so that the underflow pump accelerates the slurry to be pumped out of the concentration tank, the detention time of the slurry at the bottom of the concentration tank is shortened, the reduction speed of the slurry amount is accelerated, and the concentration is naturally reduced; and conversely, the retention time of the slurry at the bottom of the thickening tank is increased, so that the reduction speed of the slurry amount is slowed down, and the concentration naturally rises.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic perspective view of a thickener according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a discharging unit of a thickener according to an embodiment of the present invention;

fig. 3 is a schematic top view of a discharging unit of a thickener according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structure view of a dispersing assembly of a thickener according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a section of a pressure adaptation assembly of a thickener according to an embodiment of the present invention under an initial operating condition;

fig. 6 is a schematic structural view of a section of a working condition of a pressure adapter assembly of a thickener according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of an initial working condition of another pressure adapter assembly of a thickener according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a cross section of another working condition of a pressure adaptation component of a thickener according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of a dispersing shaft and dispersing pieces of a thickener according to an embodiment of the present invention.

Description of the reference numerals:

1. a support frame; 2. a concentration tank; 3. a discharging unit; 30. an underflow pump; 31. a drive member; 32. a speed regulating mechanism; 320. a driving member; 321. a driven member; 322. a linkage member; 323. a position adjustment mechanism; 33. a pulp suction groove; 34. an access hole; 35. a cover plate; 36. a pressure fitting assembly; 360. a support; 361. an adaptation groove; 362. an adaptation block; 363. an elastic member; 364. an elastic sheet; 365. an electric push rod; 366. a pressure detection block; 367. a drag reduction block; 368. an electromagnet; 369. a magnet block; 37. a material conveying pipe fitting; 38. a dispersing component; 380. a ring gear; 381. stirring the shaft; 382. stirring and dispersing the sheet bodies; 383. an annular rack; 384. a drive shaft; 4. a rake frame; 5. a material pushing plate.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 9, a thickener according to an embodiment of the present invention includes a support frame 1 and a concentration tank 2 fixedly connected to the support frame 1, the concentration tank 2 is connected to a discharge unit 3, a concentration detection mechanism (the concentration detection mechanism is a concentration meter, the concentration meter is common knowledge in the art and is not described herein in detail) is disposed at a bottom portion in the concentration tank 2, the discharge unit 3 includes an underflow pump 30, the concentration tank 2 is connected to a feed inlet of the underflow pump 30, and further includes a driving member 31, an output end of the driving member 31 is provided with a speed regulation mechanism 32, an axis of the underflow pump 30 is connected to an output end of the speed regulation mechanism 32, and the speed regulation mechanism 32 regulates a rotation speed of the underflow pump 30 based on a detection value of the concentration detection mechanism.

Specifically, the main function of the thickener is to increase the concentration of the ore slurry to meet the technical requirement of pipeline transportation, for example, the concentration range of the iron ore concentrate pipeline transportation is 62% -68% (i.e., the designed range of the concentration of the ore slurry), while the concentration of the ore slurry produced by ore dressing is about 20%, which cannot meet the technical requirement of pipeline transportation, and needs to be reached by the thickener concentration, the detection value of the concentration detection mechanism needs to be within the designed range of the concentration of the ore slurry, the rotation speed of the underflow pump 30 can be in a constant state, but the rotation speed of the driving member 31 for driving the rotation of the underflow pump 30 can only be within the rated rotation speed range basically, and the rotation speed of the drive member 31 can be overloaded when the rotation speed of the underflow pump 30 is increased, when the concentration of the slurry at the bottom of the concentration tank 2 is detected by the concentration detection mechanism, the value exceeds or is lower than the designed range of the concentration of the ore pulp, the concentration detection mechanism transmits the signal to the speed regulation mechanism 32, the speed regulation mechanism 32 is a transmission structure capable of regulating the transmission ratio, most commonly, such as a transmission, the speed regulation mechanism 32 performs self-adaptive speed change according to the signal, so that the rotating speed of the underflow pump 30 is increased or decreased, the rotating speed change of the underflow pump 30 can control the slurry amount discharged from the concentration tank 2, the residence time of the slurry in the concentration tank 2 is controlled, and thus, the slurry concentration at the bottom of the concentration tank 2 can be passively controlled, so that the severity of the slurry concentration deviating from the designed range can be reduced, and the deviation is controlled in a range as small as possible.

In the embodiment of the invention, the concentration detection mechanism is arranged to detect the change of the slurry concentration at the bottom in the concentration tank 2 in real time, and the speed regulation mechanism 32 can regulate the rotating speed of the underflow pump 30 in real time according to the detection value of the concentration detection mechanism, namely, when the underflow concentration in the concentration tank 2 is increased to exceed the design range, the speed regulation mechanism 32 increases the operating speed of the underflow pump 30, so that the underflow pump 30 accelerates the slurry to be pumped out of the concentration tank 2, the retention time of the slurry at the bottom of the concentration tank 2 is shortened, the reduction speed of the slurry amount is accelerated, and the concentration is naturally reduced; on the contrary, the detention time of the slurry at the bottom of the concentration tank 2 is increased, so that the reduction speed of the amount of the slurry is reduced, the concentration naturally rises, the concentration of the slurry at the bottom of the concentration tank 2 can be effectively controlled, and the problem that the slurry discharged from the concentration tank 2 is reworked in a design range is avoided.

Further, the speed adjusting mechanism 32 includes a driving member 320 connected to an output end of the driving member 31, a driven member 321 connected to a shaft of the underflow pump 30, and a linkage member 322 for transmitting kinetic energy of the driving member 320 to the driven member 321, the support frame 1 is provided with a position adjusting mechanism 323 for controlling displacement of the linkage member 322, preferably, the driving member 320 and the driven member 321 are both in a circular truncated cone structure, an axis of the driving member 320 is parallel to an axis of the driven member 321, the driving member 320 and the driven member 321 are oppositely disposed, a side surface of the linkage member 322 is tangential to both a side surface of the driving member 320 and a side surface of the driven member 321 and is in frictional contact, the linkage member 322 is slidably disposed on the support frame 1, and is driven to displace by the position adjusting mechanism 323 disposed on the support frame 1 (the position adjusting mechanism 323 is more in type, the present invention preferably selects a mechanism capable of driving the linkage member 322 to reciprocate linearly, such as an electric push rod 365, an air cylinder, a lead screw rod transmission mechanism, and the concentration detecting mechanism 323 is electrically connected to the position adjusting mechanism.

Specifically, when the concentration detection mechanism detects that the concentration of the slurry in the concentration tank 2 is not within the design range, the concentration detection mechanism transmits the signal to the position adjustment mechanism 323, the position adjustment mechanism 323 controls the distance of the position of the linkage member 322 based on the signal, so that the rotation speed of the underflow pump 30 can be just adapted to the speed of pumping the slurry out of the concentration tank 2, under the driving of the driving member 31, the driving member 320 rotates to drive the linkage member 322 to rotate through friction, the linkage member 322 drives the driven member 321 to rotate, and under the transmission of the linkage member 322, the driving member 320 and the driven member 321 rotate in the same direction, since the side surface of the linkage member 322 is tangent to the side surface of the driving member 320 and tangent to the side surface of the driven member 321, and both in frictional contact, the transmission ratio of the frictional transmission = driven wheel radius ÷ driving wheel radius, when the position adjustment mechanism 323 drives the linkage member 322 to move toward the thick end of the driving member 320, the linkage member 322 also moves toward the thin end of the driven member 321, which is equivalent to shorten the radius of the bottom flow, the driving wheel, the radius of the driving wheel is increased, and the rotation speed of the driven wheel is reduced, and the rotation speed of the bottom flow pump 30 is reduced, thereby achieving the purpose of increasing the concentration of the slurry in accordance with the rotation speed of the driven wheel 30. Moreover, since the present embodiment uses friction transmission, it not only realizes stepless transmission, but also can idle between the linkage 322 and the driving member 320 or the driven member 321 to protect the transmission mechanism when the torque carried by the underflow pump exceeds the carrying capacity.

Further, a slurry suction groove 33 is arranged at a feed inlet of the underflow pump 30, when the underflow pump 30 works, vacuum is generated at the slurry suction groove 33 to generate suction to slurry in the concentration tank 2, an access opening 34 is formed in the slurry suction groove 33, and the access opening 34 is sealed by a transparent cover plate 35; specifically, before the underflow pump 30 works, slurry needs to be filled in the slurry suction tank 33 in advance, and a part of the slurry needs to enter the underflow pump 30, because the underflow pump 30 belongs to one kind of centrifugal pumps, when the underflow pump 30 works, the slurry is driven to do centrifugal motion first, so that the inside of the underflow pump 30 generates a centrifugal action, the original slurry is thrown out of the underflow pump 30, the inside of the underflow pump 30 generates vacuum, the pressure is reduced, the slurry in the slurry suction tank 33 is pushed into the underflow pump 30 by external pressure stool, and the slurry in the concentration tank 2 is pushed into the slurry suction tank 33, so that the underflow pump 30 can continuously pump the slurry out of the concentration tank 2, and if the maintenance port 34 is full of slurry, it is observed that before the underflow pump 30 works, the slurry suction tank 33 is full of slurry, if the slurry is not full of slurry in the slurry suction tank 33, it is also stated that no excess slurry enters the underflow pump 30, if the slurry suction tank 33 is full of slurry, it is stated that the slurry cannot flow towards another place, so that the slurry in the slurry suction tank 33 cannot flow, the slurry cannot be cleaned, and the slurry can be maintained after the maintenance is finished, and the slurry can be removed, and the slurry can be completely.

Further, a pressure adaptation component 36 adapted to the pressure change inside the slurry suction groove 33 is arranged at the position of the access opening 34, the pressure adaptation component 36 comprises a support 360, the support 360 can be detachably connected with the access opening 34, an adaptation groove 361 communicated with the slurry suction groove 33 is formed in the support 360, an adaptation block 362 is slidably arranged in the adaptation groove 361, the support 360 is connected with the adaptation block 362 through an elastic piece 363, the support 360 is in an H-shaped structure, the adaptation groove 361 is located at the lower opening of the H-shaped structure of the support 360, two T-shaped rods are slidably arranged on a middle cross rod of the H-shaped structure of the support 360 in a parallel manner, the elastic piece 363 is sleeved on the vertical part of the T-shaped rods, and the lower ends of the T-shaped rods are fixedly connected with the adaptation block 362; specifically, when the rotation speed of the underflow pump 30 is increased, the speed of the slurry in the slurry suction tank 33 entering the underflow pump 30 is increased correspondingly, and the speed of the slurry entering the slurry suction tank 33 from the concentration tank 2 cannot be matched, under such a condition, vacuum occurs in the slurry suction tank 33, and the pressure becomes small, and the underflow pump 30 is evacuated, so that the load of the underflow pump 30 is increased, and the underflow pump 30 is damaged seriously, therefore, when the above problem occurs, the pressure in the slurry suction tank 33 is reduced, and the external air pressure causes the adapter block 362 to move toward the slurry suction tank 33 along the adapter groove 361, at this time, the elastic element 363 is compressed, the adapter block 362 enters the slurry suction tank 33 to fill a part of the vacuum, so that the pressure in the slurry suction tank 33 is recovered to normal, so that the underflow pump 30 can normally operate, essentially, the pressure in the slurry suction tank 33 is also controlled, the slurry suction tank 33 is in linear relationship with the pressure provided by the adapter block 362 and the pressure in the adapter block 362 is gradually increased, and the adapter block 362 can gradually maintain the adaptive pressure at the initial adaptive position 363, and the slurry suction tank 362 can be gradually recovered at the initial adaptive position 361.

Preferably, the surface of the adapting block 362 close to the pulp suction groove 33 is in a circular arc structure; specifically, when the adapting block 362 enters the slurry suction groove 33, slurry still needs to enter the underflow pump 30 through the slurry suction groove 33, and the adapting block 362 is in a circular arc structure close to the slurry suction groove 33, so that resistance borne by the slurry when the slurry passes through the slurry suction groove 33 can be reduced.

Furthermore, an elastic piece 364 is arranged at the connection position of the pulp suction groove 33 and the adapting groove 361, and when the elastic piece 364 is extruded by the adapting block 362, the surface facing the pulp suction groove 33 is in an arc-shaped structure; specifically, the adapting block 362 is affected by the decrease of the pressure in the slurry suction groove 33, and gradually moves from the adapting groove 361 to the slurry suction groove 33, then the adapting block 362 can extrude the elastic sheet 364, the extruded elastic sheet 364 gradually deforms elastically, and the surface of the adapting block 362 close to the slurry suction groove 33 is in an arc structure, so that the surface of the elastic sheet 364 facing the slurry suction groove 33 is also in an arc structure, the pressure in the slurry suction groove 33 is increased, the resistance of the slurry passing through the slurry suction groove 33 can be reduced, and under the blocking effect of the elastic sheet 364, the slurry can be prevented from entering the adapting groove 361, if the slurry enters the adapting groove 361, the friction force between the adapting block 362 and the wall of the adapting groove 361 can be increased due to the particulate impurities in the slurry, so that when the pressure in the slurry suction groove 33 is reduced, the adapting sensitivity of the adapting block 362 is reduced, and the slurry can be difficult to move down to a proper position in the slurry suction groove 33 due to the friction effect to fill a part of vacuum.

In the pressure adapting assembly 36, according to the pressure change in the slurry suction groove 33, the adapting block 362 can move up and down in the adapting groove 361, but there is a certain problem, theoretically, the elastic force of the elastic piece 363 is configured to be always smaller than the pressure change in the slurry suction groove 33, and it can be ensured that the adapting block 362 moves down to a proper position in the slurry suction groove 33 to fill up a part of vacuum, but in practical application, water is contained in the slurry, which can not prevent the elastic piece 363 from rusting and affecting the elastic performance thereof, and if the friction force increased by impurities is mixed between the adapting block 362 and the wall of the adapting groove 361, the adaptation sensitivity of the adapting block 362 still decreases, and the friction force is difficult to move down to a proper position in the slurry suction groove 33 to fill up a part of vacuum, so the embodiment of the present invention provides another pressure adapting assembly 36.

Further, pressure adaptation subassembly 36 still includes support 360, just connection that support 360 can be dismantled is connected with access hole 34, set up on support 360 and inhale adaptation groove 361 of dressing trough 33 intercommunication, it is equipped with adaptation piece 362 to slide in the adaptation groove 361, is equipped with electric putter 365 on the support frame 1, electric putter 365's flexible drive adaptation piece 362 is in the removal of adaptation groove 361, adaptation piece 362 slides on inhaling the face of dressing trough 33 towards and is equipped with pressure detection piece 366, be connected with pressure sensor between adaptation piece 362 and the pressure detection piece 366, electric putter 365 is based on pressure sensor's signal control adaptation piece 362's displacement.

Specifically, when the pressure in the slurry suction groove 33 becomes smaller, an attractive force is generated on the pressure detection block 366, so that the pressure detection block 366 tends to move downwards, the pressure sensor detects the signal and transmits the signal to the electric push rod 365, the electric push rod 365 drives the adaptation block 362 to move from the adaptation groove 361 to the slurry suction groove 33 based on the extension of the signal, so that the adaptation block 362 can fill up a part of the vacuum in the slurry suction groove 33, the extension distance of the electric push rod 365 can accurately control the moving distance of the adaptation block 362 according to the signal of the pressure sensor, and the changed pressure in the slurry suction groove 33 can be better adapted.

Furthermore, a plurality of pairs of resistance reducing blocks 367 are arranged on the adapting block 362 in a sliding mode in parallel, two resistance reducing blocks 367 of each pair of resistance reducing blocks 367 are symmetrically arranged in the horizontal direction at the lower portion of the adapting block 362, an electromagnet 368 is arranged on the pressure detecting block 366, the electromagnet 368 is arranged on the central line of the adapting block 362, a magnet 369 is arranged on the resistance reducing blocks 367, when currents in different directions are introduced into the electromagnet 368, attractive or repulsive magnetic force with the magnetite can be generated, therefore, each pair of resistance reducing blocks 367 can be controlled to be close to or far away from the central line of the adapting block 362, and when each pair of resistance reducing blocks 367 is farthest away, an arc-shaped structure can be formed with the pressure detecting block 366; specifically, when the adapting block 362 is pushed by the electric push rod 365 to move downwards to adapt to the pressure in the slurry suction groove 33, the electromagnet 368 is connected with current, so that the magnetic force generated by the electromagnet 368 and the magnetic force of the magnet 369 repel each other, when the adapting block 362 moves downwards for different distances, the resistance reducing block 367 at the corresponding position can extend out of the slurry suction groove 33 under the action of the repulsive force to form an arc-shaped structure with the pressure detecting block 366, the extending resistance reducing block 367 is clamped to the side wall of the bottom of the slurry suction groove 33, pressure bearing is realized by the pressure detecting block 366 at the moment, and meanwhile, the resistance of slurry passing through the slurry suction groove 33 is relieved.

Further, a rake frame 4 is axially arranged on the concentration tank 2, a material pushing plate 5 is mounted at the bottom end of the rake frame 4, the inner wall of the concentration tank 2 is in sliding contact with the material pushing plate 5, and the bottom of the concentration tank 2 is connected with the slurry suction groove 33 through a material conveying pipe fitting 37, which is the prior art and is not described in detail, a dispersing component 38 is arranged in the material conveying pipe fitting 37, and the dispersing component 38 stirs slurry entering the material conveying pipe fitting 37 based on the power of the material pushing plate 5; specifically, the rotation of the rake frame 4 can push the slurry deposited at the bottom of the concentration tank 2 to the feeding port of the material conveying pipe 37, and the concentration change of the slurry can affect the flowing of the slurry, so that the slurry entering the material conveying pipe 37 is stirred and broken up by the stirring assembly 38 driven by the rotation power of the rake frame 4, and the slurry flow rate is accelerated and more easily enters the slurry suction groove 33 to be pumped away by the underflow pump 30.

Preferably, the dispersing assembly 38 includes a gear ring 380 rotatably disposed on the feeding pipe member 37, the feeding pipe member 37 is divided into two parts by the gear ring 380 as a boundary, the gear ring 380 is rotatably connected with any part of the feeding pipe member 37, and has a good sealing property to prevent slurry leakage, the rotation of the gear ring 380 does not affect the flow of slurry in the feeding pipe member 37, a dispersing shaft 381 is disposed inside the feeding pipe member 37, an inner wall of the gear ring 380 is fixedly connected with one end of the dispersing shaft 381, a plurality of dispersing sheet bodies 382 are disposed in parallel on the dispersing shaft 381, one end surface of each dispersing sheet body 382 is in sliding contact with an inner wall of the feeding pipe member 37, an annular rack 383 is circumferentially and slidably disposed on an inner wall of the concentrating tank 2 near the feeding pipe member 37, the annular rack 383 is pushed to move synchronously during the working stroke of the material pushing plate 5, a rotating transmission shaft 384 is disposed on the support frame 1, a first gear and a second gear are respectively mounted at two ends of the transmission shaft 384, the gear ring 380 is engaged with the first gear, and the annular rack is engaged with the second gear; specifically, harrow frame 4 during operation can drive scraping wings 5 and produce toggle action to annular rack 383, make annular rack 383 follow scraping wings 5 and do the circumferential motion, annular rack 383's motion can drive a gear synchronous revolution with it meshing, so transmission shaft 384 just can rotate, transmission shaft 384 rotates just can drive ring gear 380 through No. two gears and rotate, ring gear 380 rotates and drives to stir and scatter axle 381 and rotate, it drives to stir lamellar body 382 and stir the slurry at defeated material pipe fitting 37 internal rotation to stir the slurry to stir scattered lamellar body 382, and it can produce shearing action to the slurry to stir scattered lamellar body 382, so make the slurry cut apart into more scattered body, improve its flow velocity.

Further, all the scattering sheets 382 are arranged spirally in the axial direction of the scattering shaft 381; specifically, when stirring scattered lamellar body 382 and making circumferential direction, stir scattered lamellar body 382 not only can play the effect of stirring, shearing slurry, can also play auger delivery's effect for the speed of flow of slurry further improves, and the back is accelerated to underflow pump 30 rotational speed in addition, and the further improvement of slurry velocity of flow also can the emergence of the evacuation problem of avoiding to a certain extent.

Further, one end of the dispersing sheet body 382 is embedded on the dispersing shaft 381, and the sheet surface of the dispersing sheet body 382 is obliquely arranged with the axis of the dispersing shaft 381; specifically, when the dispersing shaft 381 drives the dispersing sheet 382 to rotate, the arrangement characteristics of the dispersing sheet 382 can shear the slurry and can also play a role in pushing the slurry to move.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims (6)

1. A thickener comprises a support frame and a concentration tank fixedly connected to the support frame, wherein the concentration tank is connected with a discharging unit, and is characterized in that a concentration detection mechanism is arranged at the bottom in the concentration tank, the discharging unit comprises an underflow pump, the concentration tank is connected with a feed inlet of the underflow pump, the thickener also comprises a driving piece, a speed regulation mechanism is installed at the output end of the driving piece, a shaft of the underflow pump is connected with the output end of the speed regulation mechanism, and the speed regulation mechanism regulates and controls the rotating speed of the underflow pump based on the detection value of the concentration detection mechanism;

a slurry suction groove is formed in the feed inlet of the underflow pump, when the underflow pump works, vacuum is generated in the slurry suction groove to generate suction to slurry in the concentration tank, an access hole is formed in the slurry suction groove, and the access hole is sealed by a transparent cover plate;

the inspection hole is provided with a pressure adaptation assembly adapted to the pressure change in the slurry suction groove, the pressure adaptation assembly comprises a support, the support is detachably connected with the inspection hole, the support is provided with an adaptation groove communicated with the slurry suction groove, and an adaptation block is arranged in the adaptation groove in a sliding manner;

an electric push rod is arranged on the support frame, the electric push rod stretches and retracts to drive the adaptive block to move in the adaptive groove, a pressure detection block is arranged on the surface, facing the pulp suction groove, of the adaptive block in a sliding mode, a pressure sensor is connected between the adaptive block and the pressure detection block, and the electric push rod controls the displacement of the adaptive block based on signals of the pressure sensor; the adaptive block is provided with a plurality of pairs of resistance reducing blocks in a sliding mode in parallel, two resistance reducing blocks of each pair of resistance reducing blocks are symmetrically arranged in the horizontal direction of the lower portion of the adaptive block, the pressure detecting block is provided with an electromagnet, the electromagnet is arranged on the central line of the adaptive block, the resistance reducing blocks are provided with magnet blocks, when the electromagnet is supplied with currents in different directions, magnetic force which is attracted or repelled with the magnet blocks can be generated, therefore, each pair of resistance reducing blocks are controlled to be close to or far away from the central line of the adaptive block, and when each pair of resistance reducing blocks is farthest away from the central line of the adaptive block, the resistance reducing blocks and the pressure detecting block can form a circular arc-shaped structure; when the adaptation block is pushed by the electric push rod to move down to remove the pressure in the adaptation slurry suction groove, the electromagnet is electrified to enable the magnetic force generated by the electromagnet to repel the magnetic force of the magnet block, so that when the adaptation block moves down for different distances, the resistance reducing block at the corresponding position can extend out of the slurry suction groove under the action of repulsive force to form a circular arc-shaped structure with the pressure detection block, the extending resistance reducing block is clamped on the side wall of the bottom of the slurry suction groove, and pressure bearing is realized by the pressure detection block at the moment.

2. The thickener according to claim 1, wherein the speed adjusting mechanism comprises a driving member connected to an output end of the driving member, a driven member connected to a shaft of the underflow pump, and a linkage member for transmitting kinetic energy of the driving member to the driven member, and the support frame is provided with a position adjusting mechanism for controlling displacement of the linkage member.

3. The thickener according to claim 1, wherein a rake frame is axially provided on the thickening tank, a pusher is mounted at a bottom end of the rake frame, an inner wall of the thickening tank is in sliding contact with the pusher, a bottom of the thickening tank is connected with the slurry suction tank through a delivery pipe, and a stirring member is provided in the delivery pipe and stirs slurry entering the delivery pipe based on a power of the pusher.

4. The thickener according to claim 3, wherein the dispersing assembly comprises a gear ring rotatably disposed on a material conveying pipe member, a dispersing shaft is disposed inside the material conveying pipe member, a plurality of dispersing sheets are juxtaposed on the dispersing shaft, an annular rack is circumferentially slidably disposed on an inner wall of the thickening tank, the annular rack is pushed to move synchronously during the operation stroke of the material pushing plate, a transmission shaft is rotatably disposed on the support frame, the gear ring is engaged with one end of the transmission shaft through a tooth, and the rack is engaged with the other end of the transmission shaft through a tooth.

5. The thickener of claim 4, wherein one end of the dispersing sheet is embedded in the dispersing shaft, and the sheet surface of the dispersing sheet is inclined to the axis of the dispersing shaft.

6. The thickener of claim 4 wherein all of said agitator blades are arranged in a spiral in the axial direction of said agitator shaft.

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